|Year|Name|Birth Date|Winner|Awarding Age||
|---|---|---|---|---|---|
|1998|Nick Cheung|1967-12-02|Winner|30 years, 352 days||
|1998|Chin Kar Lok|1965-08-06|Winner|33 years, 105 days||
|2002|Moses Chan|1971-04-16|Winner|31 years, 217 days||
|2003|Raymond Lam|1979-12-08|Winner|23 years, 346 days|Youngest winner|
|2004|Ron Ng|1979-09-02|Winner|25 years, 78 days||
|2005|Bosco Wong|1980-12-13|Winner|24 years, 341 days||
|2006|Kenneth Ma|1974-02-13|Winner|32 years, 270 days||
|2007|Amigo Choi|1979-05-08|Winner|28 years, 193 days||
|2008|Wong Cho Lam|1980-01-09|Winner|28 years, 311 days||
|2009|Ngo Ka-nin|1976-09-26|Winner|33 years, 69 days||
|2010|Raymond Wong|1976-08-25|Winner|34 years, 102 days|Oldest winner|
|2011|Jin Au-Yeung|1982-06-04|Winner|29 years, 184 days||
|2012|Oscar Leung|1979-03-26|Winner|33 years, 266 days||

Question: how many winners have been at least 30 years old?
Answer: 7